Glad to hear EB have tried to do something for AI draining cities after few turns. Tho, they might have done scripts to help growth in cities, what I have experienced is that almost all non rebel cities are drained in huge settings to 1000-3000 population by AI once I invade them.

Also it seems AI is able to produce troops effeciently only twenty first years. After that almost all of their towns are drained too small(in huge settings) to produce troops effeciently.

Luckily we have mercenaries that AI uses but they dont offer too much of troubles tho.